Humidifier



FIG. 1 is a front elevational view of the design for a humidifier in accordance with the present invention;

FIG. 2 is a rear elevational view thereof;

FIG. 3 is an enlarged top plan view thereof;

FIG. 4 is an enlarged bottom plan view thereof;

FIG. 5 is an enlarged right side elevational view thereof;

FIG. 6 is an enlarged left side elevational view thereof; and,

FIG. 7 is a perspective view thereof on a reduced scale.

The broken--line showing of a humidifier a in FIGS. 1-3, 5 and 6 is for illustrative purposes only and forms no part of the claimed design. 

The ornamental design for a humidifier, shown and described. 